JP2022171615A - 半導体工程用研磨組成物および研磨組成物を適用した半導体素子の製造方法 - Google Patents
半導体工程用研磨組成物および研磨組成物を適用した半導体素子の製造方法 Download PDFInfo
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- JP2022171615A JP2022171615A JP2022073393A JP2022073393A JP2022171615A JP 2022171615 A JP2022171615 A JP 2022171615A JP 2022073393 A JP2022073393 A JP 2022073393A JP 2022073393 A JP2022073393 A JP 2022073393A JP 2022171615 A JP2022171615 A JP 2022171615A
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- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- QLNOVKKVHFRGMA-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical group [CH2]CC[Si](OC)(OC)OC QLNOVKKVHFRGMA-UHFFFAOYSA-N 0.000 description 1
- 229910052722 tritium Inorganic materials 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
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- C09K3/1454—Abrasive powders, suspensions and pastes for polishing
- C09K3/1463—Aqueous liquid suspensions
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
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- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
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Abstract
Description
*は、金属酸化物粒子の表面に結合する部分を意味し、R1およびR2は、互いに同一または異なり、それぞれ独立して、水素、置換もしくは非置換の炭素数1~10のアルキル基、置換もしくは非置換の炭素数3~10のシクロアルキル基、置換もしくは非置換の炭素数2~10のアルケニル基、および置換もしくは非置換の炭素数2~10のアルキニル基からなる群より選択され、L1は、置換もしくは非置換の炭素数1~10のアルキレン基、置換もしくは非置換の炭素数2~10のアルケニレン基、置換もしくは非置換の炭素数2~10のアルキニレン基、および置換もしくは非置換の炭素数3~10のシクロアルキレン基からなる群より選択される。
半導体研磨用組成物の製造
金属酸化物粒子としてコロイダルシリカを使用した。前記コロイダルシリカは、表面改質剤として3-アミノプロピルトリエトキシシランを反応させて、表面にアミノシラン化合物が結合するように製造した。
研磨組成物に対する研磨評価
(1)研磨評価
CMP評価と同一の条件で研磨を進行させた後、自体製造したクリーニングケミカル(cleaning chemical)溶液を用いて、ブラシ(Brush)の回転速度500rpm、60s 2000cc/minのケミカル噴射条件でクリーニング工程を行った。クリーニング工程が完了したボロンドーピングされたポリシリコン膜質およびun-dopedポリシリコン膜質は密閉された状態で、SKC社保有のAIT-XP+装置を用いて総欠陥数(total defect)を測定した。
ディフェクト(Defect)測定が完了した300mm waferを用いてAFM測定を進行させた。AFM測定進行条件の場合、300mm waferのposition(-150mm~+150mm)領域のうち、0mm、-75mm、+75mm、-150mm、+150mmそれぞれの位置で5回ずつ測定したRa結果の平均値を計算した。
120:定盤
130:半導体基板
140:ノズル
150:研磨スラリー
210:シリコンウエハ
220:シリコン酸化膜
230:シリコン窒化膜
240:ボロンドーピングされたポリシリコン膜
T:トレンチ
Claims (10)
- 水;および
研磨粒子を含み、
前記研磨粒子は、粒子表面に結合した官能基を含み、
前記官能基は、アミン基を含み、
ボロンドーピングされたポリシリコン膜に対するシリコン窒化膜の研磨選択比が1:100~1:600である
半導体工程用研磨組成物。 - 前記研磨組成物は、組成物全体を基準として、アミン基の重量%含有量が0.0185重量%~0.05重量%である、
請求項1に記載の半導体工程用研磨組成物。 - 前記粒子表面に結合した官能基は、下記化学式1の構造を含む、
請求項1に記載の半導体工程用研磨組成物:
ここで、
*は、金属酸化物粒子の表面に結合する部分を意味し、
R1およびR2は、互いに同一または異なり、それぞれ独立して、水素、置換もしくは非置換の炭素数1~10のアルキル基、置換もしくは非置換の炭素数3~10のシクロアルキル基、置換もしくは非置換の炭素数2~10のアルケニル基、および置換もしくは非置換の炭素数2~10のアルキニル基からなる群より選択され、
L1は、置換もしくは非置換の炭素数1~10のアルキレン基、置換もしくは非置換の炭素数2~10のアルケニレン基、置換もしくは非置換の炭素数2~10のアルキニレン基、および置換もしくは非置換の炭素数3~10のシクロアルキレン基からなる群より選択される。 - 前記研磨組成物は、アミン基を含む研磨率向上剤をさらに含み、
組成物全体を基準として、前記研磨粒子の表面に結合した官能基に含まれたアミン基の重量%含有量は、0.008重量%~0.06重量%であり、
前記研磨率向上剤に含まれたアミン基の重量%含有量は、0.006重量%~0.05重量%である、
請求項1に記載の半導体工程用研磨組成物。 - 前記研磨組成物は、窒化膜研磨抑制剤をさらに含む、
請求項1に記載の半導体工程用研磨組成物。 - 界面活性剤およびpH調整剤をさらに含む、
請求項1に記載の半導体工程用研磨組成物。 - 前記研磨組成物は、シリコン窒化膜のエッチング率が100Å/min以下である、
請求項1に記載の半導体工程用研磨組成物。 - 水;
アミン基を含む官能基で表面処理された研磨粒子;および
アミン系研磨率向上剤を含み、
ボロンドーピングされたポリシリコン膜のエッチング率が2,000Å/min以上である
半導体工程用研磨組成物。 - 前記アミン系研磨率向上剤は、研磨組成物全体を基準として0.03重量%~0.095重量%含む、
請求項8に記載の半導体工程用研磨組成物。 - ボロンドーピングされたポリシリコン膜およびシリコン窒化膜を含む半導体基板を提供するステップと、
前記ボロンドーピングされたポリシリコン膜および前記シリコン窒化膜を研磨組成物を用いて研磨するステップとを含み、
前記研磨組成物は、水;および
研磨粒子を含み、
前記研磨粒子は、粒子表面に結合した官能基を含み、
前記官能基は、アミン基を含み、
前記ボロンドーピングされたポリシリコン膜に対する前記シリコン窒化膜の研磨選択比が1:100~1:600である
半導体素子の製造方法。
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